The fallout from the pandemic has run the gamut from an unstable economy to an uptick in social-emotional problems. Experts suggest the pandemic may also be responsible for a continued upward trajectory in sexually transmitted diseases among Connecticut’s youngest sexually active residents. Conditions during the pandemic, including less access to sexual health care and more free time, have helped to exacerbate the trend among young people, say health care providers. “Most parents are working. Students are home alone. They are having friends over,” said Ceri Burke, a nurse practitioner at Danbury High School’s on-site health center.